I have the Mermaid 6500 BTU model w/ reverse cycling. The unit seems like it is just blowing hot air. The compressor is running, pump is running, the sea strainer is clean and flowing water properly. The pickup vent is 4"x6" which should be adequate. Not sure what else to check. Could a switch or Valve be stuck? Thermostat bad? Any help would be appreciated.

Freon charge?

I wondered that too, but I don't have anyway to test it myself.

Check the red rubber overpressure switch on the unit. Push it a few times and try again.

if the compressor is running that switch is not the issue, I am a mermaid dealer, how old is the unit ? you sure the compressor is running and not just the fan ? had it been working ? feel free to call me Rob 540-786-8111

Rob,

The unit is about a year old. The unit was working when I purchased the boat this spring. How late is to late to call? I may stop by the shop tomorrow as I work in Fredericksburg.

I'm here until 6 and start at 8 but i am in and out during the day, but leave a message and I will get back to you..Rob

Rob,

Just talked to Mermaid and they are going to take care of it for me. I appreciate the help!

Good, they have been really good on any problems, which I have not seen many that did not come from something else in the 7 years I've been a dealer.....Rob